Sharon Osborne Celebrates Osborne's 20th Birthday With Jack and Kelly.

"Thank you all for being the perfect guest house," Sharon Osbourne wrote on Instagram, celebrating the 20th anniversary of her family's MTV reality series, The Osbournes.

Two decades ago, MTV raised Ozzy Osbourne and his family in the spirit of reality television.

On Saturday, Sharon, Kelly, and Jack Osborne celebrated the 20th anniversary of the premiere of their hit family show of the same name, The Osbournes, which ran four seasons until the March 2005 finale.

Sharon, 69, shares a montage of footage from Paramore's Still Into You with a preface to 73-year-old Ozzy, which expresses classic Ozzy-ism. "I love you all. I love you guys more than life itself, but you all are crazy. Twenty years ago today, we welcomed your family into our home; thank you for all of that. They were the perfect guest of the house," he wrote—Sharon in the photo caption.

"20 years ago today #TheOsbournes first premiered on @mtv - I'm getting old!!! Where has the time gone?" Kelly, 37, wrote the post herself. "Both you and me!" Jack, 36, wrote and shared his sister's post on his Instagram story. The famous family was greeted with compliments from friends and fans in the comments. "OG!" wrote Michelle Visage. "It seems..." Carrie Ann Inaba commented. "Emblematic," added Johnny Woez.

Following the Black Sabbath frontman and his British family life in Los Angeles, the Osbornes chronicled several key family moments, including Sharon's battle with colon cancer in 2002 and the near-fatal ATV incident with Ozzy in 2003. So, likewise, with ordinary daughter pair Aime Osborne, 38, who refused to participate in the show. The series' warning came when Ozzy suggested to The Mirror that in 20 years, he and Sharon would return to their home in Beverly Hills in England.

"We're leaving Los Angeles. We're a little sad. But the taxes are getting higher. I'm sad because I like living and living there," he said, adding, "If they pay better taxes, I can come back. I don't know."